Breakdown of Tu dois réparer toutes les roues du vélo.
tu
you (informal singular)
le vélo
the bike
du
of the / from the (masculine singular, with plural des)
devoir
to have to / must
le
him, it (masculine direct object pronoun)
tout
all, everything
réparer
to repair
la roue
the wheel
Questions & Answers about Tu dois réparer toutes les roues du vélo.
How would I use the grammar from this lesson to say 'You have to repair any of the wheels' instead of all of them?
Why is it toutes les roues and not just tout les roues?
Could I say des roues de vélo instead of des roues du vélo in this sentence?
It depends on your exact meaning. In this sentence, du vélo is a mandatory contraction of de le vélo, meaning 'of the bike', referring to one specific bicycle. If you said des roues de vélo, it would mean 'bicycle wheels' as a general type of part, rather than the wheels belonging to this particular bike.
Why does réparer stay in the infinitive rather than being conjugated?
When you have a modal verb like devoir (must or have to) expressing obligation, the action verb that follows it always stays in its dictionary form, the infinitive. Here, the conjugated verb dois is immediately followed by the infinitive réparer.
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